How is marginal cost calculated? a. by adding fixed cost to variable cost b. by multiplying fixed cost by total cost c. by subtracting variable cost from fixed cost d. by dividing variable cost by increase in total product

The believe that the best answer among the choices provided by the question is D. by dividing variable cost by increase in total product.
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The  ancient egyptians  who  built the pyramids  may have been  able  to move massive stone blocks across the desert by wetting the sand in front of a contraption  built  to pull the heavy objects